ADATA LEGEND 900 1000GB

SSD Description

The ADATA LEGEND 900 1000GB functions as a cost-optimized high-performance PCIe 4.0 NVMe storage solution, engineered to saturate sequential read bandwidth while utilizing a streamlined architecture. The drive typically employs a DRAM-less design, leveraging Host Memory Buffer (HMB) technology to manage logical-to-physical mapping tables via system RAM rather than onboard volatile memory. While the Bill of Materials (BOM) is subject to variance, the drive generally utilizes a 4-channel controller—often variants of the InnoGrit IG5220 or Maxio MAP1602—paired with high-density 3D NAND flash. The LEGEND 900 is notable for its asymmetric performance profile; while it achieves the 7,000 MB/s read threshold required for Sony PlayStation 5 compatibility, the 4,700 MB/s write speed indicates the limitations of its 4-channel controller design compared to 8-channel flagship drives. ADATA frequently revises component configurations, so specific NAND manufacturers may vary by batch. The pre-installed heat spreader is a thin aluminum composite film rather than a high-mass heatsink, making the drive susceptible to thermal throttling during sustained, heavy write operations in chassis with poor airflow.

Key Specifications

• Interface: PCIe Gen4 x4, NVMe 1.4
• Max Sequential Read: 7,000 MB/s
• Max Sequential Write: 4,700 MB/s
• Controller Architecture: DRAM-less, 4-Channel (Variable; typically InnoGrit or Maxio)
• NAND Type: 3D NAND (typically TLC)
• Cache: Host Memory Buffer (HMB) / SLC Caching
• Encryption/Error Correction: LDPC (Low-Density Parity-Check) Code
• Physical Trait: Single-sided PCB design (improves compatibility with slim laptops)

Hardware Alternatives

• HP FX900 (Non-Pro): Often shares the InnoGrit IG5220 controller architecture found in many LEGEND 900 revisions, offering a nearly identical performance profile and HMB implementation.
• Western Digital WD_BLACK SN770 1000GB: A direct competitor in the high-performance DRAM-less segment; typically offers differing random I/O characteristics and sustained write behavior.
• Lexar NM710: Targets the same market segment using the Maxio MAP1602 controller; the LEGEND 900 is tuned for higher peak reads (7,000 MB/s vs. the NM710's ~5,000 MB/s range) to meet specific console certification requirements.